/******************************************************************************
*
* Module Name: prexpress - Preprocessor #if expression support
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "aslcompiler.h"
#define _COMPONENT ASL_PREPROCESSOR
ACPI_MODULE_NAME ("prexpress")
/* Local prototypes */
static char *
PrExpandMacros (
char *Line);
#ifdef _UNDER_DEVELOPMENT
/******************************************************************************
*
* FUNCTION: PrUnTokenize
*
* PARAMETERS: Buffer - Token Buffer
* Next - "Next" buffer from GetNextToken
*
* RETURN: None
*
* DESCRIPTION: Un-tokenized the current token buffer. The implementation is
* to simply set the null inserted by GetNextToken to a blank.
* If Next is NULL, there were no tokens found in the Buffer,
* so there is nothing to do.
*
*****************************************************************************/
static void
PrUnTokenize (
char *Buffer,
char *Next)
{
UINT32 Length = strlen (Buffer);
if (!Next)
{
return;
}
if (Buffer[Length] != '\n')
{
Buffer[strlen(Buffer)] = ' ';
}
}
#endif
/******************************************************************************
*
* FUNCTION: PrExpandMacros
*
* PARAMETERS: Line - Pointer into the current line
*
* RETURN: Updated pointer into the current line
*
* DESCRIPTION: Expand any macros found in the current line buffer.
*
*****************************************************************************/
static char *
PrExpandMacros (
char *Line)
{
char *Token;
char *ReplaceString;
PR_DEFINE_INFO *DefineInfo;
ACPI_SIZE TokenOffset;
char *Next;
int OffsetAdjust;
strcpy (Gbl_ExpressionTokenBuffer, Gbl_CurrentLineBuffer);
Token = PrGetNextToken (Gbl_ExpressionTokenBuffer, PR_EXPR_SEPARATORS, &Next);
OffsetAdjust = 0;
while (Token)
{
DefineInfo = PrMatchDefine (Token);
if (DefineInfo)
{
if (DefineInfo->Body)
{
/* This is a macro. TBD: Is this allowed? */
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"Matched Macro: %s->%s\n",
Gbl_CurrentLineNumber, DefineInfo->Identifier,
DefineInfo->Replacement);
PrDoMacroInvocation (Gbl_ExpressionTokenBuffer, Token,
DefineInfo, &Next);
}
else
{
ReplaceString = DefineInfo->Replacement;
/* Replace the name in the original line buffer */
TokenOffset = Token - Gbl_ExpressionTokenBuffer + OffsetAdjust;
PrReplaceData (
&Gbl_CurrentLineBuffer[TokenOffset], strlen (Token),
ReplaceString, strlen (ReplaceString));
/* Adjust for length difference between old and new name length */
OffsetAdjust += strlen (ReplaceString) - strlen (Token);
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"Matched #define within expression: %s->%s\n",
Gbl_CurrentLineNumber, Token,
*ReplaceString ? ReplaceString : "(NULL STRING)");
}
}
Token = PrGetNextToken (NULL, PR_EXPR_SEPARATORS, &Next);
}
return (Line);
}
/******************************************************************************
*
* FUNCTION: PrIsDefined
*
* PARAMETERS: Identifier - Name to be resolved
*
* RETURN: 64-bit boolean integer value
*
* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
*
*****************************************************************************/
UINT64
PrIsDefined (
char *Identifier)
{
UINT64 Value;
PR_DEFINE_INFO *DefineInfo;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Is defined?: %s\n", Gbl_CurrentLineNumber, Identifier);
Value = 0; /* Default is "Not defined" -- FALSE */
DefineInfo = PrMatchDefine (Identifier);
if (DefineInfo)
{
Value = ACPI_UINT64_MAX; /* TRUE */
}
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"[#if defined %s] resolved to: %8.8X%8.8X\n",
Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
return (Value);
}
/******************************************************************************
*
* FUNCTION: PrResolveDefine
*
* PARAMETERS: Identifier - Name to be resolved
*
* RETURN: A 64-bit boolean integer value
*
* DESCRIPTION: Returns TRUE if the name is defined, FALSE otherwise (0).
*
*****************************************************************************/
UINT64
PrResolveDefine (
char *Identifier)
{
UINT64 Value;
PR_DEFINE_INFO *DefineInfo;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Resolve #define: %s\n", Gbl_CurrentLineNumber, Identifier);
Value = 0; /* Default is "Not defined" -- FALSE */
DefineInfo = PrMatchDefine (Identifier);
if (DefineInfo)
{
Value = ACPI_UINT64_MAX; /* TRUE */
}
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"[#if defined %s] resolved to: %8.8X%8.8X\n",
Gbl_CurrentLineNumber, Identifier, ACPI_FORMAT_UINT64 (Value));
return (Value);
}
/******************************************************************************
*
* FUNCTION: PrResolveIntegerExpression
*
* PARAMETERS: Line - Pointer to integer expression
* ReturnValue - Where the resolved 64-bit integer is
* returned.
*
* RETURN: Status
*
* DESCRIPTION: Resolve an integer expression to a single value. Supports
* both integer constants and labels.
*
*****************************************************************************/
ACPI_STATUS
PrResolveIntegerExpression (
char *Line,
UINT64 *ReturnValue)
{
UINT64 Result;
char *ExpandedLine;
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Resolve #if: %s\n", Gbl_CurrentLineNumber, Line);
/* Expand all macros within the expression first */
ExpandedLine = PrExpandMacros (Line);
/* Now we can evaluate the expression */
Result = PrEvaluateExpression (ExpandedLine);
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Expression Resolved to: %8.8X%8.8X\n",
Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Result));
*ReturnValue = Result;
return (AE_OK);
#if 0
InvalidExpression:
ACPI_FREE (EvalBuffer);
PrError (ASL_ERROR, ASL_MSG_INVALID_EXPRESSION, 0);
return (AE_ERROR);
NormalExit:
DbgPrint (ASL_DEBUG_OUTPUT, PR_PREFIX_ID
"**** Expression Resolved to: %8.8X%8.8X\n",
Gbl_CurrentLineNumber, ACPI_FORMAT_UINT64 (Value1));
*ReturnValue = Value1;
return (AE_OK);
#endif
}